{"coeffs": [-2.2665122234678145e-07, 6.144804050681014e-09, -0.28065436492310597, 0.015531398415781788], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.972690680391407e-08, 3.0368350986995073e-08, 0.033492157166853664, 0.0272095837515786], "covariance": [[2.4727652602851553e-15, -3.701995159760262e-17, 4.574083140974924e-10, -3.1577753729844587e-10], [-3.701995159760262e-17, 9.222367416693247e-16, 2.0782921653137437e-10, 1.6233659008148589e-10], [4.574083140974924e-10, 2.0782921653137437e-10, 0.0011217245916892275, 0.00011029745341409859], [-3.1577753729844587e-10, 1.6233659008148589e-10, 0.0001102974534140986, 0.0007403614479341703]]}